Stool



FIG. 1 is an isometric view of a stool showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is another side elevation view thereof; and,

FIG. 6 is another side elevation view thereof. 

CLAIM The ornamental design for a stool, as shown and described. 